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Growth and Yield Responses of BARI Gom-26 ( Triticum Aestivum L.) to Naphthalene Acetic Acid.

NARGIS JAHAN
Department of Botany, University of Dhaka, Dhaka-1000, Bangladesh.

A.M.M. GOLAM ADAM
Department of Botany, University of Dhaka, Dhaka-1000, Bangladesh.

Abstract/ Executive Summary:

The effect of various concentrations of NAA (0, 25, 50, 75, 100 mg/I) on the growth and yield components of BARI Gom-26 was investigated . Data recorded on plant height, number of tillers per plant and number of leaves per plant showed negative performance in most cases with a few exceptions (7 and 14 DAS due to 25 and 50 mg/I NAA). The 50 mg/I NAA produced the highest total dry matter (TDM) at all the stages of growth except at 21 and 28 DAS and significant variations were observed at 7 DAS. Length of .spike, grains per spike and 1000- seed weight increased following all the rates of NAA applications. Number of effective tillers and maximum yield (g/plant and t/ha) increased significantly only due to application of 50 mg/I NAA and the increases were 9.09 and 12.24°/o . higher over the control, respectively. Non-effective tillers per plant decreased with all concentrations of NAA application and the maximum decrease (60.20%) was recorded with 50 mg/I NAA. Non-significant highest harvest index was also recorded with 50 mg/I followed by 100 mg/I NAA application.

Keywords: BARI Gom-26, NAA, Foliar application, Growth, Yield

Location: In the research field of the Department of Botany, University of Dhaka

Start Date: 00-11-2011

End Date: 00-03-2012

Program Area: Crop-Soil-Water Management

Commodity: Wheat

Objectives:

To investigate the effect of foliar application of NAA o growth and yield performance of BARI Gom-26.

Methodology:

A field experiment was conducted in the research field of the Department of Botany, University of Dhaka during November 2011 to March 2012 to investigate the effect of NAA at different concentrations on growth and yield performance of BARI Gom -26. The experiment was laid out in RCBD with split plot arrangements, replicated four times. The experimental field was prepared conventionally. Seeds of BARI Gom-26 were collected from BARI, Joydebpur, Gazipur, commonly known as Hashi, semi-dwarf in height, early maturing with high yield potential released in 2010 and can be grown successfully throughout the country for commercial cultivation. Grains are amber in colour, bright and larger in size. Seeds were sterilized with 0.5% calcium hypochlorite and sown on 14 November in lines 20 cm apart. Fertilizers were applied at doses recommended by BARI (260, 170, 110 and 125 kg/h of urea, triple super phosphate, muriate of potash and gypsum, respectively). Two-thirds of urea and the full amount of the other fertilizers were applied as a basal amount during final land preparation. The remaining urea was applied immediately af ter the first irrigation (at the age of 23 days). Cow-dung was also mixed uniformly at the rate of 9880 kg/h. Weeding was done at the age of 18 followed by thinning to keep plant to plant distance of 10 cm. Second and third irritations were applied at the age of 40 and 70 days. The trial consisted of five foliar treatments : To = 0 mg/I (control), Ti = 25 mg/l, Ti = 50 mg/l, T₃ = 75 mg/l, and T₄ = 100 mg/l NAA. Treatments were applied as foliar spray at the age of 30 days. Data on plant height, number of tillers per plant, number of leaves per plant and total dry matter (TOM) per plant were recorded weekly from the age of 7 days after spray (DAS) up to harvest. Final harvest was done on 3rd March, 2012. Number of effective tillers, number of non-effective tillers per plant, number of spikes per plant, number of grains per spike, 1000-grain weight (g), grain yield (g/plant and t/ha) and harvest index (%) were calculated after harvest. The data were complied and subjected to statistical analysis and treatments means were compared for significance by using LSD test (¹²) at 5% level of probability.

Source of Information: Dhaka Univ. J. Biol. Sci. 22(2): 119-125, 2013 (July)

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Data recorded on plant height, number of tillers per plant and number of leaves per plant showed negative performance in most cases with a few exceptions (7 and 14 DAS due to 25 and 50 mg/I NAA). The 50 mg/I NAA produced the highest total dry matter (TDM) at all the stages of growth except at 21 and 28 DAS and significant variations were observed at 7 DAS. Length of .spike, grains per spike and 1000- seed weight increased following all the rates of NAA applications. Number of effective tillers and maximum yield (g/plant and t/ha) increased significantly only due to application of 50 mg/I NAA and the increases were 9.09 and 12.24°/o . higher over the control, respectively. Non-effective tillers per plant decreased with all concentrations of NAA application and the maximum decrease (60.20%) was recorded with 50 mg/I NAA. Non-significant highest harvest index was also recorded with 50 mg/I followed by 100 mg/I NAA application.

Knowledge Management: Journal